Fix Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'EventEspresso\core\services\request\middleware\RecommendedVersions' does not have a method 'minimum_wp_version_error'

Fix issue where HTML entities are decoded when displaying and editing messages

Fix all form input security issues

Refactor submit inputs so they always show the default value set on them (the original value), not the current value (which may change if user input populates the form using EE_Form_Section_Proper::receive_form_submission())

Fix conflict with WordPress 4.9 built in plugin code editor

Fix missing success notices on Message List Table actions

Fix conditional in EE_Messages_Validator::validate()

Delay instantiating EE_Payment_Method_Manager when EE_Register_Payment_Method::deregister is called

Add missing root path for the generated Check In Log url

Fix fatal error in DbSafeDateTime

Stop logging to espresso_error_log.txt

Enhancements:

Add logic to core to disable specific add-ons before they can even register